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Softwood is wood from gymnosperm trees such as conifers. The term is opposed to hardwood , which is the wood from angiosperm trees. The main differences between hardwoods and softwoods is that the softwoods completely lack vessels (pores). [ 1 ]
Global Wood Density Database; National Hardwood and Lumber Association; American Hardwood Information Center; American Hardwood Export Council; Australian National Association of Forest Industries
The Canada–U.S. softwood lumber dispute is one of the largest and most enduring trade disputes between both nations. [1] This conflict arose in 1982 and its effects are still seen today. British Columbia , the major Canadian exporter of softwood lumber to the United States , was most affected, reporting losses of 9,494 direct and indirect ...
The wood from conifers (e.g. pine) is called softwood, and the wood from dicotyledons (usually broad-leaved trees, e.g. oak) is called hardwood. These names are a bit misleading, as hardwoods are not necessarily hard, and softwoods are not necessarily soft. The well-known balsa (a hardwood) is actually softer than any commercial softwood.
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In general, softwoods naturally have an acetyl content from 0.5 to 1.5% and more durable hardwoods from 2 to 4.5%. Acetylation takes wood well beyond these levels with corresponding benefits. These include an extended coatings life due to acetylated wood acting as a more stable substrate for paints and translucent coatings.
In North America, virgin (non-recycled) wood fibre is primarily extracted from hardwood (deciduous) trees and softwood (coniferous) trees. The wood fibre can be extracted as a primary product, or collected during the milling of lumber. [1] Wood fibres can also be recycled from used paper materials. [2]
This "quarter" system is rarely used for softwood lumber; although softwood decking is sometimes sold as 5/4, even though it is actually one inch thick (from milling 1 ⁄ 8 in or 3.2 mm off each side in a motorized planing step of production). The "quarter" system of reference is a traditional North American lumber industry nomenclature used ...